This is likely a bug in network-manager, not policykit...adding network- manager to this.
Also, I don't see any activity on the upstream bug that would suggest it's been addressed in any way. ** Also affects: network-manager (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1782263 Title: NetworkManager authentication problems caused by polkit Status in network-manager package in Ubuntu: New Status in policykit package in Ubuntu: Confirmed Bug description: The following message, or variations upon it, appears dozens of times, one immediately after the other, in my system log. <warn> [1531853719.4893] error requesting auth for org.freedesktop.NetworkManager.settings.modify.hostname: Authorization check failed: Failed to open file “/proc/10006/status”: No such file or directory The problem began when I did the following package update. apt-cache policy policykit-1 policykit-1: Installed: 0.105-20 Candidate: 0.105-20ubuntu0.18.04.1 Version table: 0.105-20ubuntu0.18.04.1 500 500 http://archive.ubuntu.com/ubuntu bionic-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu bionic-security/main amd64 Packages *** 0.105-20 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status When (via the TimeShift backup program) I restored my system to a state before the package was installed, the problem stopped. When I did have the problem, some networks would have trouble connecting. I asked about the issue on Mint's IRC channel, and no solution - save reinstalling - emerged; but by that point I had not traced the problem to policykit. Mint 19 x64 Cinnamon. I report this problem here because it seems to me - I might be wrong - an Ubuntu rather than Mint problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1782263/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp